So I finally got my a/c working like its supposed to. It was the solenoids in the control panel. But I have no heat, I checked my door and motor and both are good and working properly. I'm guessing that leaves my heater core, both hose going to it are hot and feel like they have pressure. Can I take the hoses off and use my pressure washer to try and blow it out? Its a small electric one so I'd say its about 1600psi. Any input?